With ingredients 30 eggs, salt 50 grams, a small pot of grass ash, 50 grams of quicklime, 50 grams of edible alkali, a small pinch of black tea, rice husk (or with sorghum shells, grass ash instead of) the right amount, the right amount of water

1, wash the eggs. Wash the eggs with water and dry them.

2, put lime powder, lye, grass ash into a basin, mix well.

3, put the salt in a pot and fry then. Pour water and black tea into the pot of fried salt and boil.

4, the black tea salt water filtered off the tea, poured into the pot containing a mixture of raw lime, lye, grass ash, add a small amount of several times, and eventually become a paste best, not too thin.

5, the prepared fresh eggs or duck eggs, placed in the adjusted ash material rolling a few times, so that their surfaces are coated with a thick layer of ash powder

6, the eggs into the rice bran rolling a few times, and then put into the prepared containers, after sealing the preservation of the environment at about 20 degrees Celsius, after ten days after the inside of the skin eggs can be done.

Reference: Baidu Encyclopedia - Eggs